I need help with this please

[inedhalp]

I've got this question in a revision sheet, ive done the venn diagram to what I think is correct but im missing the individual students that got each correctly. Heres an image for reference :

 

[Deleted member 4993]

View attachment 26937
I've got this question in a revision sheet, ive done the venn diagram to what I think is correct but im missing the individual students that got each correctly. Heres an image for reference :
View attachment 26938

How many students got at least one section correctly = 20 - 4 = 16

Please review your Venn diagram at label each section correctly. Are you stating that number students that got BOTH CORRECT = 5?

 

[Harry_the_cat]

Where did the 5 come from? Did you just calculate 14-9 ?

IF the 5 is correct, then the number in the remaining part of Circle A would be 4 (to make a total of 9) and 9 in the remaining part of Circle B (to make a total of 14). BUT then you would have 4+5+9+4=22 not 20 in total.

The number that got BOTH A and B correct is not 5.

14-9 is NOT the appropriate calculation (if that is what you did). Can you work out what it should be?